Foldable sunglasses solve a problem every sunglasses owner knows too well: the bulky case, the scratched lenses at the bottom of a bag, the pair left behind because there was nowhere to put them. A good folding frame collapses to a fraction of its size and slips into a pocket — so your shades are with you when the sun actually shows up. This guide covers what foldable sunglasses are, how the folding mechanism works, what to look for when buying a pair, and how to choose the right style for your face and your day. What are foldable sunglasses? Foldable sunglasses are sunglasses engineered to collapse down to a compact, pocketable size. Instead of folding only at the temples...